Thermal Death Studies of Third-Instar Caribbean Fruit Fly (Diptera: Tephritidae)

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Laboratory tests examined mortality of 3rd-instar Caribbean fruit fly, Anastrepha suspensa (Loew), exposed to 40°C in water baths. Larvae chilled to 4°C before treatment had similar percentage survival (94%) as larvae held at ambient temperature (≍25°C) after exposure to 40°C for 10 min. Significant differences for percentage survival were found between larvae exposed for various durations in sealed metal tubes with rearing diet and larvae exposed in fabric-sleeved cylinders with no diet. Submersion of larvae for 2 h in water at ≍25°C before treatment in a 40°C water bath for 67 min did not influence survival. When larvae were exposed to 40°C for 67 min in empty tubes (no diet), larval cohorts at low densities (32 ± 14 larvae per tube) had higher survival (85.8%) than survival (19.4%) of larvae treated at higher densities (361 ± 155 larvae per tube). Temperature regimes alone did not explain larval mortality. Other factors such as larval density, substrate, and environmental factors could contribute to mortality.

Document Type: Research Article

Publication date: August 1, 1998

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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